hwmon: (sht15) Constify platform_device_id

The platform_device_id is not modified by the driver and core uses it as
const.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

drivers/hwmon/sht15.c

@@ -1074,7 +1074,7 @@ static int sht15_remove(struct platform_device *pdev)
 	return 0;
 }
 
-static struct platform_device_id sht15_device_ids[] = {
+static const struct platform_device_id sht15_device_ids[] = {
 	{ "sht10", sht10 },
 	{ "sht11", sht11 },
 	{ "sht15", sht15 },